Method of assembling the upper of a safety shoe with a safety plate therein



Sept. 8, A. G. BAUDQU METHOD OF ASSEMBLING THE UPPER OF A SAFETY SHOE WITH A SAFETY PLATE THEREIN Filed July 1. 1968 3 SheetsSheet 1 Sept. 8, 1910 G. BAUDOU 3,526,915

METHOD OF ASSEMBLING THE UPPER OF A SAFETY ..SHOE WITH A SAFETY PLATE THEREIN ,Filed July 1.- 1968 3 Sheets-Sheet 2 Sept- 8, 1970 I A. J. G. BAUDOU 3,526,915

METHOD OF ASSEMBLINGYTHE UPPER OF A SAFETY ,SHOE WITH A SAFETY PLATE THEREIN Filed July 1. 1968 3 Sheets-Sheet I5 United States Patent Int. Cl. A43d US. Cl. 12-146 7 Claims ABSTRACT OF THE DISCLOSURE A method of assembling the upper of a safety shoe in which a lining is cut and stitched at the front part of a shoe upper to form a pocket, the portions of which have been pre-coated with a heat sensitive cement. A safety toe plate and a member shaped to the contour of the front part of the shoe are secured to the pocket after which the front part of the upper is turned inwardly and a flexible insole is secured to the assembly. The assembled upper is then placed onv a mold and a sole of elastomeric or plastomeric material is secured thereto by direct molding.

BRIEF SUMMARY OF THE INVENTION The invention relates to a method of assembling of a safety shoe in which a metal plate is secured between a lining and the upper.

It is known to insert a metal plate between the upper and the lining of a shoe for protecting the toes of the wearer against injury.

Heretofore such an assembly could be produced only on wooden or plastic lasts, which involves a series of long operations and a substantial capital investment.

It is an object of the present invention to provide a method of assembling shoe uppers with steel toe plates, to which soles are adapted to be attached by direct molding without resorting to intermediate conventional lasting, thereby avoiding the need for lasts therefor and the attendent costs incurred by the operations involved in their use.

According to the method of the invention, a pocket is formed by means of the upper lining, the component parts of which are coated with an adhesive. The pocket so formed is then placed over a member having the shape of the toe end of the shoe, and is covered with a metal plate which may be provided with a suitable filler. The front portion of the upper, which may be pre-shaped, is then turned inwardly. A flexible insole member, may be duck or any other suitable material, is attached by the method known as slip-lasting. The upper thus assembled is placed on a mold for attachment thereto of a sole of elastomeric or plastomeric material.

An embodiment of the invention is illustrated by way of example in the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a bottom plan view of a shoe upper and a lining before the forming of a pocket in accordance with the invention;

FIG. 2 is a similar view of a shoe upper and lining with a pocket formed therein; and

FIG. 3 is a bottom plan view of an upper assembled in accordance with the invention, with a toe plate, and ready for attachment of an insole.

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DETAILED DESCRIPTION The various components of a shoe upper, produced by the slip-lasting method, except the insole, are assembled in a" manner well known in the shoe-making art.

The upper 2 comprises a lining 1, the front portion of which is not cemented to the upper. The lining is cut so as to form two parts 3 and 3a, which have previously been coated with a heat-sensitive cement. These two parts are joined by a line of stitches 4 to form a pocket 5, which is then placed on a heated metal form to activate the cement.

A steel plate 6 is then fitted over the pocket 5, together with a filler 7 which adheres to the lining 1 (FIG. 3). The filler 7 has a shape corresponding to the contour of the front part of the shoe. The front part of the upper 2 is then turned inwardly to produce the shape for the front part of the upper as shown in FIG. 3.

A flexible insole (not shown) is then sewn along the margin of the upper '2 and of the quarter 8.

The upper thus assembled may then be placed upon a mold to have a sole of elastomeric or plastomeric material attached thereto by direct molding.

It will be understood that the invention as above described may be capable of various modifications without departing from the scope of the appended claims.

What is claimed is:

1. A method of assembling the upper of a safety shoe for attachment thereto of a sole by direct molding, said method comprising securing a lining to a shoe upper in a region outside a front part of the upper, forming a pocket in said lining at said front part by cutting the lining in a central region thereof to form two adjacent parts and stitching said parts together along a junction line, securing a safety toe plate to the lining at said pocket, and turning the front part of the upper inwardly whereby an assembly is formed to 'which a flexible insole member can be attached and a sole directly molded.

2. A method as claimed in claim 1 wherein said safety toe plate is adhesively secured to said lining.

3. A method as claimed in claim 2 wherein said lining is pre-coated with a heat sensitive cement in the region of the front part thereof prior to the formation of said pocket and said toe plate is secured to the pocket after the application of heat thereto.

'4. A method as claimed in claim 3 comprising securing to said pocket a member having a shape corresponding to the contour of the front part of the shoe, whereby the pocket is sandwiched between the member and said upper.

5. A method as claimed in claim 4 wherein said toe plate is secured to said lining together with said memher.

6. A method as claimed in claim 5 wherein said member and toe plate are secured as a unit to said pocket.

7. A method as claimed in claim 6 wherein the attach ment of the insole member to the upper secures the pocket and the plate and member between said upper and the insole.

References Cited UNITED STATES PATENTS 2,457,463 12/1948 Greenan 12l46 2,651,118 9/1953 Root l2l42 X 2,716,249 8/1955 Holloway 12--146 2,935,753 5/ 1960 Heaton.

PATRICK D. LAWSON, Primary Examiner 

